	(function() {
	    $.MsgBox = {
	        Alert: function(title, msg) {
	            GenerateHtml("alert", title, msg);
	            btnOk(); //alert只是弹出消息，因此没必要用到回调函数callback
	            btnNo();
	        },
	        Confirm: function(title, msg, callback) {
	            GenerateHtml("confirm", title, msg);
	            btnOk(callback);
	            btnNo();
	        }
	    }
	    //生成Html
	    var GenerateHtml = function(type, title, msg) {
	        var _html = "";
	        _html += '<div id="mb_box"></div><div id="mb_con"><span id="mb_tit">' + title + '</span>';
	        _html += '<a id="mb_ico">x</a><div id="mb_msg">' + msg + '</div><div id="mb_btnbox">';
	        if (type == "alert") {  
	            _html += '<input id="mb_btn_ok" type="button" value="确定" />';  
	        }  
	        if (type == "confirm") {  
	            _html += '<input id="mb_btn_ok" type="button" value="确定" />';  
	            _html += '<input id="mb_btn_no" type="button" value="取消" />';  
	        } 
	        _html += '</div></div>';
	        //必须先将_html添加到body，再设置Css样式
	        $("body").append(_html);
	        //生成Css
	        GenerateCss();
	    }

	    //生成Css
	    var GenerateCss = function() {
	        $("#mb_box").css({
	            width: '100%',
	            height: '100%',
	            zIndex: '99999',
	            position: 'fixed',
	            filter: 'Alpha(opacity=60)',
	            backgroundColor: 'black',
	            top: '0',
	            left: '0',
	            opacity: '0.6'
	        });
	        $("#mb_con").css({
	            zIndex: '999999',
	            width: '400px',
	            position: 'fixed',
	            backgroundColor: 'White',
	            borderRadius: '15px'
	        });
	        $("#mb_tit").css({
	            display: 'block',
	            fontSize: '14px',
	            color: '#444',
	            padding: '10px 15px',
	            backgroundColor: '#DDD',
	            borderRadius: '15px 15px 0 0',
	            borderBottom: '3px solid #009BFE',
	            fontWeight: 'bold'
	        });
	        $("#mb_msg").css({
	            padding: '20px',
	            lineHeight: '20px',
	            borderBottom: '1px dashed #DDD',
	            fontSize: '13px'
	        });
	        $("#mb_ico").css({
	            display: 'block',
	            position: 'absolute',
	            right: '10px',
	            top: '9px',
	            border: '1px solid Gray',
	            width: '18px',
	            height: '18px',
	            textAlign: 'center',
	            lineHeight: '16px',
	            cursor: 'pointer',
	            borderRadius: '12px',
	            fontFamily: '微软雅黑'
	        });
	        $("#mb_btnbox").css({
	            margin: '15px 0 10px 0',
	            textAlign: 'center'
	        });
	        $("#mb_btn_ok,#mb_btn_no").css({
	            width: '85px',
	            height: '30px',
	            color: 'white',
	            border: 'none'
	        });
	        $("#mb_btn_ok").css({
	            backgroundColor: '#168bbb'
	        });
	        $("#mb_btn_no").css({
	            backgroundColor: 'gray',
	            marginLeft: '20px'
	        });
	        //右上角关闭按钮hover样式
	        $("#mb_ico").hover(function() {
	            $(this).css({
	                backgroundColor: 'Red',
	                color: 'White'
	            });
	        }, function() {
	            $(this).css({
	                backgroundColor: '#DDD',
	                color: 'black'
	            });
	        });
	        var _widht = document.documentElement.clientWidth; //屏幕宽
	        var _height = document.documentElement.clientHeight; //屏幕高
	        var boxWidth = $("#mb_con").width();
	        var boxHeight = $("#mb_con").height();
	        //让提示框居中
	        $("#mb_con").css({
	            top: (_height - boxHeight) / 2 + "px",
	            left: (_widht - boxWidth) / 2 + "px"
	        });
	    }
	    //确定按钮事件
	    var btnOk = function(callback) {
	        $("#mb_btn_ok").click(function() {
	            $("#mb_box,#mb_con").remove();
	            if (typeof(callback) == 'function') {
	                callback();
	            }
	        });
	    }
	    //取消按钮事件
	    var btnNo = function() {
	        $("#mb_btn_no,#mb_ico").click(function() {
	            $("#mb_box,#mb_con").remove();
	        });
	    }
	})();
